Fitting for reinforced concrete structures.



PATENTED APR. 21, 1908 v G. M. GRAHAM. FITTING FOR REINFORCED CONCRETE STRUCTURES.

' APPLICATION FILED DEG.10,1907.

2O will hereinafter more jaws w enoa'ea MsGRAHAM, or cHIoAGQfiILLINois, Assisnos'ro G.'A.IEDWYARD KOHLER, OF

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FITTING Fort anrnroaonn o'onoRE'rE STRUCTURES Specification of Letters Patent.

Patented April 21, 1908.

Application filed December 10, 1907. Serial No. 405,892.

To all whom it may concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Fittings for ReinforcedConcrete Structures,. of which the following is a'specification.

This invention relates to fittings used in cou ling together the tubular reinforcing ske eton frame for concrete structures, such as forms the subject matter of my prior Letters Patent No. 865,490 of Sept. 1071907; andthe present improvement has for its ob-- jcct to provide a strong and economical formation and arrangement of the coupling parts,adapted to afford ease and rapidity 1n the erection of the reinforcing frame aforesaid, and with which a substantial and rigid joining of the fram parts is attained, all as ully appear.

In the accompanying drawings illustrative of the present invention z-Figure 1 is a horizontal sectional view on linc w :t Fig. 2. Fig. 2 is a vertical sectional view on line acw Fig. 1. Figs. 3 and 4 are detached perspective views of the up or and lower members of the fitting or coup ing.

Similar numerals of reference indicate like parts in the different views.

Referring to the drawings, 1 and 2 represent the main shells or bodies of the two counterpart members which .constitute the present im rovcd fitting. Each. of, said shells isof a lollow cylindrical shape adapted to fit the peri hery of a cylindrical post or column 3 of t 1e skeleton reinforcing frame of a concrete structure, such as forms "the subject matter of my prior Letters Patent No. 865,490 of Sept. 10, 1907, In the present improvement, as in my companion application Serial No. 405,891 filed December 10,1907, each of said shells or bodies 1. and 2, is cut away at one end to form the pairs 4 and 5 of o posed and semi-flexible tongues or iich are adapted to be clam ed upon the outer surface of the aforesaid post or column 3. To such end the said tongues are provided with diametric orifices 6 and 7 for the passage .of the clamping bolts 8 and 9 by which such clamping result is attained. In

connection with such construction the post or column 3 Wlll be provided with corresponding orifices for the passage of said bolts.

10 and 11 are series of lateral branches formed at the ends of the shells or bodies 1 and 2, opposite to the clamping tongues 4 and 5 aforesaid; said branches have an angular relation to each other and are segmental in cross section and corresponding with the curvature of and adapted to fit the peripheries of the adjacent ends of the horizontal girders 12 of the reinforcing frame aforesaid.

13 and 14 are bolt holes formed in the lateral branches 10 and 11 aforesaid, for the passage of the clamping bolts 15 by which the said branches are-firmly clamped to the exterior surface of said girders, and which girders are provided with holes corresponding to the holes .13 and 14 for the passage of said clamping bolts.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is

1. A fitting for connecting together the tubular members of a reinforcing frame for concrete structures, comprising a pair of counterpart members, each member comprising a tubular shell having at one end a air of semi-flexible tongues in opposed reation, and laterally disposed branches at the other end of a segmental form, means for drawing said tongues together, and means for drawing said' branches together, substantially as set forth.

2.'A fitting for connecting together the cylindrical members'of a reinforcing frame for concrete structures, comprising a pair of counterpart members, each member comprising a cylindrical shell having at one end a pair of segmental tongues in opposed rela tion, and laterally disposed branches at the other end of a segmental form, means for.

drawing said tongues together, and means for drawing said branches together, substantially as set forth.

, 3. The combination with the vertical column and horizontal girders of a reinforcing frame for concrete structures of a pair of counterpart members, each ,melnbercomprising a tubular shell having at one end a pair of semi-flexible tongues in opposed relation, and. laterally disposed branches at the other end of a segmental form, and bolts passing through said tongues and column and through said branches and girders to secure the set forth.

parts in position, substantially-as 4. The combination with the cylindrical branches and girders to secure the parts in 0 column and girders of a reinforcing frame for position, substantially as set forth.

concrete structures, of a pair of counterpart Signed at Chicago, Illinois, this 29th day anem'begsfilegch member comdprising afcylinof November, 1907.

5 ricas e avin atoneen a airo semiflexible tongues op o sed relation, and lat- GEORGE GRAHAM orally disposed branches at the other end of Witnesses:

asegnaental form, and bolts passing through ROBERT BURNS,

seiitongnes and column and through said ,HIBNRY Mon. 

